L. I. Shevtsova, M. A. Esikov, Yu. N. Malyutina, A. I. Gavrilov, N. Yu. Cherkasova, V. N. Malikov, “Structure and properties of the nickel aluminide based alloy obtained from a mechanically activated powder mixture by spark plasma sintering”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2024, Volume 50, Issue 2,Pages <nobr>3

Structure and properties of the nickel aluminide based alloy obtained from a mechanically activated powder mixture by spark plasma sintering

L. I. Shevtsova^a, M. A. Esikov^ab, Yu. N. Malyutina^a, A. I. Gavrilov^c, N. Yu. Cherkasova^a, V. N. Malikov^d

^a Novosibirsk State Technical University, Novosibirsk, Russia
^b Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
^c Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
^d Altai State University, Barnaul, Russia

Abstract: The paper presents the results of structural studies and evaluation of the strength properties of a domestic Ni$_3$Al-based alloy grade VKNA-4U obtained from initial components by mechanical activation and subsequent spark plasma sintering. The material was sintered in the temperature range of 1100–1200$^\circ$C. The highest level of bending strength (1800 MPa) was recorded for the VKNA-4U alloy obtained by heating to 1200$^\circ$C, a compacting pressure of 40 MPa, and a holding time of 5 minutes. The relative density of the material sintered in this mode is $\sim$99%.

Keywords: spark plasma sintering, mechanical activation, nickel aluminide, VKNA-4U alloy, strength properties.

Received: 05.05.2023
Revised: 26.08.2023
Accepted: 16.10.2023

DOI: 10.61011/PJTF.2024.02.56974.19620